<output>: The Output element
The <output>
HTML element is a container element into which a site or app can inject the results of a calculation or the outcome of a user action.
Attributes
This element includes the global attributes.
for
-
A space-separated list of other elements'
id
s, indicating that those elements contributed input values to (or otherwise affected) the calculation. form
-
The
<form>
element to associate the output with (its form owner). The value of this attribute must be theid
of a<form>
in the same document. (If this attribute is not set, the<output>
is associated with its ancestor<form>
element, if any.)This attribute lets you associate
<output>
elements to<form>
s anywhere in the document, not just inside a<form>
. It can also override an ancestor<form>
element. name
-
The element's name. Used in the
form.elements
API.
The <output>
value, name, and contents are NOT submitted during form submission.
Examples
In the following example, the form provides a slider whose value can range between 0
and 100
, and an <input>
element into which you can enter a second number. The two numbers are added together, and the result is displayed in the <output>
element each time the value of any of the controls changes.
html
<form oninput="result.value=parseInt(a.value)+parseInt(b.value)">
<input type="range" id="b" name="b" value="50" /> +
<input type="number" id="a" name="a" value="10" /> =
<output name="result" for="a b">60</output>
</form>
Result
Accessibility Concerns
Many browsers implement this element as an aria-live
region. Assistive technology will thereby announce the results of UI interactions posted inside it without requiring that focus is switched away from the controls that produce those results.
Technical summary
Content categories | Flow content, phrasing content, listed, labelable, resettable form-associated element, palpable content. |
---|---|
Permitted content | Phrasing content. |
Tag omission | None, both the starting and ending tag are mandatory. |
Permitted parents | Any element that accepts phrasing content. |
Implicit ARIA role | status |
Permitted ARIA roles | Any |
DOM interface | HTMLOutputElement |
Specifications
Specification |
---|
HTML Standard # the-output-element |
Browser compatibility
BCD tables only load in the browser